Did you conduct a survey that the majority (or "most") don't play very much? The B/R list for Vintage hasn't changed a lot over the years so anyone who has the old cards pretty much knows what's on it. And if they're a new player coming in to play and don't know, they're most likely not going to know about the old cards to begin with to know whether what cards are restricted or not. It might come up with current cards getting restricted like Chrome Mox, but that's an expensive card to get anyway for a new player AND to use it a "casual" game. If he's trying to get 4 of it, he's probably going to play or know about the tourney scene and know it's restricted.